Add LIS::pruneValue() and extendToIndices(). These two functions are
used by the register coalescer when merging two live ranges requires
more than a trivial value mapping as supported by LiveInterval::join().

The pruneValue() function can remove the part of a value number that is
going to conflict in join(). Afterwards, extendToIndices can restore the
live range, using any new dominating value numbers and updating the SSA
form.

Use this complex value mapping to support merging a register into a
vector lane that has a conflicting value, but the clobbered lane is
undef.

llvm-svn: 164074

These extra operands are not needed by register allocators using
VirtRegRewriter, and RAFast don't need them any longer.

By omitting the <imp-def> operands, it becomes possible for the new
register coalescer to track which lanes are valid and which are undef.

llvm-svn: 164073

I have to work out the Target/CodeGen header dependencies
before putting this back.

llvm-svn: 164072

llvm-svn: 164071

llvm-svn: 164070

llvm-svn: 164068

llvm-svn: 164067

llvm-svn: 164066

llvm-svn: 164065

llvm-svn: 164064

llvm-svn: 164063

TableGen subtarget emitter. Generate resolveSchedClass generated hook for resolving instruction variants.

llvm-svn: 164062

llvm-svn: 164061

llvm-svn: 164060

Map the CodeGenSchedule object model onto data tables. The structure
of the data tables is defined in MC, so for convenience we include
MCSchedule.h. The alternative is maintaining a redundant copy of the
table structure definitions. Mapping the object model onto data tables
is sufficiently complicated that it should not be interleaved with
emitting source code. This avoids major problem with the backend for
itinerary generation.

llvm-svn: 164059

llvm-svn: 164058

llvm-svn: 164057

While we are setting the earlier def to true, also make it live.

llvm-svn: 164056

destination in SimplifyCondBranchToCondBranch.

llvm-svn: 164054

we will do that when we implement the full save/restore.

Patch by Reed Kotler.

llvm-svn: 164051

Increase the static sizes of some SmallSets. finalizeBundle() is very frequently called for some backends, and growing into an std::set is overkill for these numbers.

llvm-svn: 164044

llvm-svn: 164043

- Preserve the original NOutVT during casting from vector to integer by
  extracting vector elements.

llvm-svn: 164042

Keep GCC's warnings happy. It can't reason out that the state machine won't
ever hit the potentially uninitialized use in OPC_FilterValue.

llvm-svn: 164041

llvm-svn: 164040

LLVM_ATTRIBUTE_USED forces emission of a function. To silence unused function warnings use LLVM_ATTRIBUTE_UNUSED.

llvm-svn: 164036

MSVC8 won't compile lower_bound if one is missing.

llvm-svn: 164035

The cases where no initialization happens should still be checked for logic flaws.

llvm-svn: 164032

llvm-svn: 164030

This is used in the AMDIL and R600 backends.

llvm-svn: 164029

Add Michael Spencer's iterator class for stepping through relocations.  Add method that, given a symbol index, will return the symbol's data.

llvm-svn: 164026

Disable the protection from escaped allocas in an attempt to find violating passes. This may break the buildbots. I plan to revert it in a few hours.

llvm-svn: 164024

llvm-svn: 164017

llvm-svn: 164016

llvm-svn: 164015

llvm-svn: 164014

Remove a couple unused fields. Not detected by Wunused-private-field because of unimplemented copy constructor and copy assignment operator that make the class look incomplete. Upcoming patch will mark them deleted.

llvm-svn: 164013

llvm-svn: 164012

llvm-svn: 164009

llvm-svn: 164008